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Power Macintosh 4400 Developer Note Power Macintosh 4400 1/29/97 © Apple Computer, Inc. 1997 Apple Computer, Inc. LIMITED WARRANTY ON MEDIA AND © 1997 Apple Computer, Inc. REPLACEMENT All rights reserved. If you discover physical defects in the No part of this publication may be manual or in the media on which a software reproduced, stored in a retrieval product is distributed, ADC will replace the system, or transmitted, in any form or media or manual at no charge to you by any means, mechanical, electronic, provided you return the item to be replaced photocopying, recording, or otherwise, with proof of purchase to ADC. without prior written permission of ALL IMPLIED WARRANTIES ON THIS Apple Computer, Inc., except to make a MANUAL, INCLUDING IMPLIED backup copy of any documentation WARRANTIES OF MERCHANTABILITY provided on CD-ROM. AND FITNESS FOR A PARTICULAR The Apple logo is a trademark of PURPOSE, ARE LIMITED IN DURATION Apple Computer, Inc. TO NINETY (90) DAYS FROM THE DATE Use of the “keyboard” Apple logo OF THE ORIGINAL RETAIL PURCHASE (Option-Shift-K) for commercial OF THIS PRODUCT. purposes without the prior written consent of Apple may constitute Even though Apple has reviewed this trademark infringement and unfair manual, APPLE MAKES NO WARRANTY competition in violation of federal and OR REPRESENTATION, EITHER EXPRESS state laws. OR IMPLIED, WITH RESPECT TO THIS MANUAL, ITS QUALITY, ACCURACY, No licenses, express or implied, are MERCHANTABILITY, OR FITNESS FOR A granted with respect to any of the PARTICULAR PURPOSE. AS A RESULT, technology described in this book. THIS MANUAL IS SOLD “AS IS,” AND Apple retains all intellectual property YOU, THE PURCHASER, ARE ASSUMING rights associated with the technology THE ENTIRE RISK AS TO ITS QUALITY described in this book. This book is AND ACCURACY. intended to assist application developers to develop applications only IN NO EVENT WILL APPLE BE LIABLE for Apple-labeled or Apple-licensed FOR DIRECT, INDIRECT, SPECIAL, computers. INCIDENTAL, OR CONSEQUENTIAL Every effort has been made to ensure DAMAGES RESULTING FROM ANY that the information in this manual is DEFECT OR INACCURACY IN THIS accurate. Apple is not responsible for MANUAL, even if advised of the possibility printing or clerical errors. of such damages. Apple Computer, Inc. THE WARRANTY AND REMEDIES SET 1 Infinite Loop FORTH ABOVE ARE EXCLUSIVE AND IN Cupertino, CA 95014 LIEU OF ALL OTHERS, ORAL OR 408-996-1010 WRITTEN, EXPRESS OR IMPLIED. No Apple dealer, agent, or employee is Apple, the Apple logo, AppleLink, authorized to make any modification, Apple SuperDrive, GeoPort, extension, or addition to this warranty. LaserWriter, LocalTalk, Mac, Macintosh, Performa, PlainTalk, PowerBook, and Some states do not allow the exclusion or Power Macintosh are trademarks of limitation of implied warranties or liability Apple Computer, Inc., registered in the for incidental or consequential damages, so United States and other countries. the above limitation or exclusion may not Adobe, Acrobat, and PostScript are apply to you. This warranty gives you trademarks of Adobe Systems specific legal rights, and you may also have Incorporated or its subsidiaries and other rights which vary from state to state. may be registered in certain jurisdictions. Helvetica and Palatino are registered trademarks of Linotype-Hell AG and/ or its subsidiaries. ITC Zapf Dingbats is a registered trademark of International Typeface Corporation. PowerPC is a trademark of International Business Machines Corporation, used under license therefrom. Simultaneously published in the United States and Canada. Contents Figures and Tables vii Preface About This Note ix Contents of This Note ix Supplemental Reference Documents x The Apple Developer Catalog x Apple Developer World Web Site xi Conventions and Abbreviations xi Typographical Conventions xi Standard Abbreviations xi Chapter 1 Introduction 1 Summary of Features 2 Comparison With Apple Logic Board Design LPX-40 3 Compatibility Issues 4 Communications Slot 4 DRAM Expansion 5 DRAM DIMM Dimensions 5 Cache Expansion 5 ATA (IDE) Hard Disk and ATAPI CD-ROM Drive 6 Video Display RAM 6 External Features 7 Front View 7 Back View 8 Chapter 2 Architecture 9 Block Diagram and Main ICs 10 Main Processor 10 PowerPC 603e Microprocessor 10 Memory Subsystem 10 RAM 11 ROM 11 Second-Level Cache (Optional) 11 System RAM 13 Custom ICs 13 PSX IC 13 O’Hare IC 14 iii AWACS Sound IC 15 CudaLite IC 15 ATI 264VT-A4S2 IC 16 Display RAM DIMM 16 Chapter 3 I/O Features 19 Board Layout 20 Serial I/O Ports 22 Apple Printer and Modem Ports 22 ADB Port 24 Apple ADB Keyboard 24 Disk Drives 25 Floppy Disk Drives 25 GCR Floppy Disk Drive 25 ATA (IDE) Hard Disk 26 Hard Disk Specifications 26 Hard Disk Connectors 28 Pin Assignments 28 ATA (IDE) Signal Descriptions 29 CD-ROM Drive 29 SCSI Bus 30 SCSI Connector 30 SCSI Bus Termination 31 Sound 31 Sound Output 31 Sound Input 32 Sound Input Specifications 33 Digitizing Sound 34 Sound Modes 34 Built-in Video 34 Video Connector 35 Video Display Sense Codes 36 Video Display Resolution 38 Chapter 4 Expansion Features 39 DRAM DIMMs 40 DRAM DIMM Connectors 42 RAM Address Multiplexing 45 RAM Devices 46 RAM Refresh 46 RAM DIMM Dimensions 46 Second-Level Cache DIMM 48 iv Video RAM 50 Video RAM DIMM Card 53 PCI Expansion Slot 54 Index 57 v Figures and Tables Chapter 1 Introduction 1 Figure 1-1 Front view of the computer 7 Figure 1-2 Back view of the computer 8 Table 1-1 Comparison with the Apple Logic Board Design LPX-40 3 Chapter 2 Architecture 9 Figure 2-1 System block diagram 12 Chapter 3 I/O Features 19 Figure 3-1 Power Macintosh 4400 connector layout 20 Figure 3-2 Serial port sockets 23 Figure 3-3 Maximum dimensions of the hard disk 27 Figure 3-4 Mini-phono jack for sound output 32 Figure 3-5 Mini-phono microphone sound-input jack 34 Figure 3-6 Macintosh 15-pin external monitor connector 35 Table 3-1 Connectors on the Power Macintosh 4400 logic board 21 Table 3-2 Serial port signals 23 Table 3-3 ADB connector pin assignments 24 Table 3-4 Reset and NMI key combinations 25 Table 3-5 Pin assignments on the GCR floppy disk connector 25 Table 3-6 Pin assignments on the ATA (IDE) hard disk connector 28 Table 3-7 Signals on the ATA (IDE) hard disk connector 29 Table 3-8 Pin assignments for the SCSI connectors 30 Table 3-9 Signal assignments for the sound output connector 32 Table 3-10 Signal assignments for the sound-nput jack 33 Table 3-11 Pin assignments for the Macintosh 15-pin external monitor connector 35 Table 3-12 Video display sense codes 36 Table 3-13 Maximum pixel depths for resolution setting 38 Chapter 4 Expansion Features 39 Figure 4-1 Dimensions of the RAM DIMM 47 Figure 4-2 Video DIMM card dimensions 54 Table 4-1 DRAM DIMM configurations supported in DIMM slot 1 40 Table 4-2 DRAM DIMM configurations supported in DIMM slots 2 and 341 vii Table 4-3 Pin assignments on the 3.3 V unbuffered EDO DRAM DIMM connectors 42 Table 4-4 RAM DIMM signals 45 Table 4-5 Address multiplexing modes for various DRAM devices 45 Table 4-6 Address multiplexing in noninterleaved banks 46 Table 4-7 Pin and signal assignments for the L2 cache DIMM connector 48 Table 4-8 Signal descriptions for L2 cache DIMM connector 49 Table 4-9 Pin and signal assignments on the 120-pin video DIMM connector 51 Table 4-10 PCI signals 55 viii PREFACE About This Note This developer note describes the Power Macintosh 4400 computer, which is a new Macintosh model that uses a logic board based on the Apple Logic Board Design LPX-40. This developer note describes the differences and similarities between features of the Power Macintosh 4400 computer and the Apple Logic Board Design LPX-40. The information in the Apple Logic Board Design LPX-40 developer note is repeated in chapters 2 through 4 of this developer note. If you are already familiar with the LPX-40 logic board, Chapter 1 provides you with the information required to understand the design features of the Power Macintosh 4400 computer. This developer note is intended to help hardware and software developers design products that are compatible with the Macintosh products described here. If you are unfamiliar with Macintosh computers or would simply like more technical information, you may wish to read the related technical documents listed in the section “Supplemental Reference Documents.” Contents of This Note 0 The information is arranged in four chapters and an index. ■ Chapter 1, “Introduction,” gives a summary of the features of the Power Macintosh 4400 computer and discusses issues related to compatibility with other Macintosh computer software and hardware. ■ Chapter 2, “Architecture,” describes the organization of the logic board. This chapter includes a block diagram and descriptions of the main components of the logic board. ■ Chapter 3, “I/O Features,” describes the built-in input/output (I/O) device interfaces and the external I/O ports. It also describes the built-in video support for external video monitors. ■ Chapter 4, “Expansion Features,” describes the expansion slots on the Power Macintosh 4400 computer logic board. This chapter provides descriptions of the supported DRAM, second-level cache, and I/O expansion slots and brief descriptions of the expansion modules for the other slots. ix Supplemental Reference Documents 0 For a description of the version of the Mac OS that supports the Power Macintosh 4400 computer, developers should refer to Technote 1050. Developers should have the relevant books of the Inside Macintosh series.
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